Air-valve for steam-radiators



(No Model.) Y

J. POULSON. AIR VALVE FOR STEAM RADIATORS.

No. 442,912. Patented-Damm, 1890 FIG.3

VUNITED STATES PATENT OFFICE.

JOSEPH POULSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEPHILADELPHIA EXHAUST YENTILATOR COMPANY, OF PENNSYLVANIA.

Al R-VALVE FOR STEAM-RADIATORS.

SPECIFICATION forming part of Letters Patent No. 442,912, dated December16, 1890.

Serial No. 356,162. (No model.)

To a/ZZ whom it may concern:

Be it known thatI, JOSEPH PoULsoN, of the city and' county ofPhiladelphia, and State of Pennsylvania, have invented an Improvement inAir-Valves for Steam-Radiators, of which the following is aspecification.

My invention has reference to air-valves for steam-radiators; and itconsists of certain improvements, which are fully set forth in thefollowing specification and shown in the accompanying drawings, whichform a part thereof.

Ihe object of my invention is to provide a suitable construction whichshall be automatic in its action, opening a vent for the escape of airfrom the interior of the radiator to the atmosphere when the radiator iscold and when steam is being forced into the radiator and closing saidvent immediately upon theexpulsion of the air and the filling of theradiator with steam, whereby provision is made for the proper entranceof steam to the radiator when the latter is in a cold condition filledwith air.

In carrying out my invention I provide a valve-chamber with a port androtary valve adapted to open or close said port and actuated by a springaffected by the temperature of the air or steam within thevalve-chamber. T he actuating-spring may be made of two pieces of metalhaving different expansibilities and preferably formed in the shape of aspiral or helix, so as to tend to wind up or unwind under the iniiuenccof varying temperatures.

Referring' to the drawings, Figure 1 is an elevation of a steam-radiatorhaving an airvalve applied thereto. Fig. 2 is a sectional elevation ofmy improved air-valve on line 5c o f Fig. et. Fig. 3 is an elevation ofthe spring. Fig. 4 is a cross-section of my improved air-valve on line yy of Fig. 2. Fig. o is a cross-section of same on line .2f e. Fig.l V(i1s a cross-section of same on line s s. Fig.

7 is a view similar to Fig. 2, showing a modified construction embodyingmy invention; and Fig. 8 is a cross-sectional view of the same on theline f1; c of Fig. 7.

A is the radiator, which may be of any suitable construction. B is theair-valve applied thereto, so as to permit the escape of air from iitsinterior through the nozzle D and port F of the air-valve to theatmosphere. The nozzle D supports the valve-chamber C, containing ValveG, provided with a port H and having a slot I, in which a pin or screw Jin the chamber O passes to prevent the longitudinal movethe portF ormoving so as to make the cylindrical part of the valve G come over theport F to seal it. p

Adj ustably fitted to the chamber C is a cap is a helical or coil springL, one end of which is connected at O to the cap K and the other end atP with the cylindrical valve G. This spring L is preferably formed koftwo strips der the same temperature and brazed together. Copper and ironmay be used for this purpose. Vhen the spring is affected by heat, ituntwists or twists, according as to whether on the inner side of thespring or upon the outside thereof, and in so nntwisting or twisting itrotates the valve G and closes or opens the port F.

ment shown in Fig. 2, and steam being admitted to the radiator A., theair contained in the radiator is blown through the port F, escaping intothe atmosphere. As soon as the cap K and heats the spring L, causing itto rotate the valve G- to automatically close the port F. So long as theradiator is kept hot the spring L will maintain the valve in as thesteam is shutoff from the radiator andv it becomes cold the spring Lreverses its movement and brings the port II in line with the port F,allowing the inward passage of ator. By loosening the screw S androtating the cap K upon the chamber C any adjustthe valve-seat E, inwhich is iitted a rotary ment of the valve and yet permit its rotationfor the purpose of bringing the port H over 6o K, which is held inposition by a clampingthe said screw S. Located within the cap K 7o ofmetal N M of differentexpansibilities unthe metal of greatestexpansibility is located So The parts being in the relative arrangetheair is expelled steam iinds its wayinto 9o position to seal the port F;but just as soon air to destroy the vacuum. within the radiroo lVhile Iprefer to make the spring lA compound or ot` two metals of differentexpansibility, it may be formed of a single piece ot metal, as theheating tendency will tend to uncoil it, and thereby cause a rotation otthe valve G; but l prefer to torni the spring as first described. lhevalve (t is made tubular, so as to allow the passage ot` steam to thespring L; but it is quite evident that any .other passage or connectionmight be made between the nozzle l) and the interior ot' the cap K topermit the passage of steam-such, for instance, as is indicated indotted lines in Fig. T-obviating the necessity ot the steam passingthrough the rotary valve.

Having new described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The combination, with a steam-radiator, ofan air-valve consisting ota valve-chamber having a valve-seat and a port opening tothe atmosphere,a rotary valve to open or close said port, located within saidvalve-chamber, a spring to rotate said rotary valve, connected directlytherewith and having substantially the same axis oi rotation, and aninelosing chamber or cap surrounding said spring and communicating` withthe interior ot the radiator.

2. An air-valve for a steam-radiator, consisting of a valve-chamberhaving a valveseat and a port opening to the atmosphere, in combinationwith a rotary tubular valve to open or close the said port, locatedwithin said valve, and an inclosing chamber or cap su rrounding saidspring, having` connection with the steam entering the air-valve bymeans of the oriticc through the tubular rotary valve.

3. An air-valve for a steam-rznliator, consisting ot avalve-chamberhaving a valve-seat and a port opening to the atmosphere,in combination with a rotary valve to open or close said port, locatedwithin said valve-chamber, a spring to rotate said rotary valve, aninclosing chamber or cap surrounding said spring, a connection betweenthe one end ot the spring and the inclosiug chamber or cap` a connectionbetween the other end ot the spring and rotary valve, and means toadjust the inclosing chamber' or cap about the axis of rotation of therotary valve.

4. An air-valve for a steam-radiator, consist-ing of a valve-chamberhaving a valve-seat and a port opening to the atlnosphereJ incombination with a rotary valve to open or close said port, locatedwithin said valve-chamber, a spring to rotate said rotary valve, aninclesing chamber or cap surrounding said spring, a connection betweenone end et the spring and the inclosing chamber or cap, a connectionbetween the other end ot the spring and rotary valve, moans to adjustthe inclosing chamber or cap about the axis of rotation of the rotaryvalve, and a projecting pin or screw to prevent the longitudinalmovement of the rotary valve.

5. An air-valvc for steam-radiators, consisting of an air-nozzle torattachment to a radiator, a chamberor cap communicating with theair-nozzle, a valvechamber located between said chamber or cap andtheair-nozzle, provided with a valve-seat and a port opening to theatmosphere, a valve in said valvechamber, and a spring to operate saidvalve, located in the chamber or cap, whereby the steam from theradiator may pass from the air-nozzle into said chamber or cap to expandthe spring therein and thereby operate the l valve in the valve-chamber.

t3. An air-valve forsteam-radiators,consisting of an air-nozzle forattachment to a radiator, a chamber or cap communicating with theair-nozzle, a valve-chamber located be tween said chamber or cap andtheair-nozzle, provided with a valve-seat and a port opening` to theatmosphere, a rotary valve in said valve-chamber, and a coiled spring tooperate said valve, located in the chamber or cap and having one endattached to said cap and the other end to the valve, whereby the steam trom the radiator may pass from the air-nozzle into said chamber or capto expand the spring therein and thereby operate the valve in thevalve-chamber.

7. An air-valve for a steam-radiatorfconsisting of an airnozzle forattachment to the radiator, a valve-chamber adjacent thereto providedwith a valve-seat and an outlet-port leading to the atmosphere, a secondchamber v opening from said valve-chamber, a tubular valve-chamber, aspring to rotate said rotary rotary valve located in said Valve-chamberand connecting the air-nozzle and second chamber, and a spring locatedin said second l chamber and connected with the rotary valve l in theintermediate valve-chamber to operate it, whereby the steam t rom theair-nozzle may pass through the tubular rotary Valve into the secondchamber to act upon the spring therein.

IOO

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the valve G, and the spring L, havingone end connected with theadjustable cap K and the other end with the valve G, whereby the ten- 15sion of the spring upon the valve may be varied by the adjustment of thecap K.

In testimony of which invention I have hereunto set my hand.

JOSEPH. POULSON. Witnesses:

CHAS. F. SIMMONS, ALEXANDER RICKEY.

